US20230103628A1 - Webbing winding device - Google Patents

Webbing winding device Download PDF

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Publication number
US20230103628A1
US20230103628A1 US17/909,955 US202117909955A US2023103628A1 US 20230103628 A1 US20230103628 A1 US 20230103628A1 US 202117909955 A US202117909955 A US 202117909955A US 2023103628 A1 US2023103628 A1 US 2023103628A1
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US
United States
Prior art keywords
pawl
spool
displacement member
sensor lever
webbing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
US17/909,955
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English (en)
Inventor
Chihiro SANO
Kazuhiro Yamada
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tokai Rika Co Ltd
Original Assignee
Tokai Rika Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tokai Rika Co Ltd filed Critical Tokai Rika Co Ltd
Assigned to KABUSHIKI KAISHA TOKAI-RIKA-DENKI-SEISAKUSHO reassignment KABUSHIKI KAISHA TOKAI-RIKA-DENKI-SEISAKUSHO ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SANO, CHIHIRO, YAMADA, KAZUHIRO
Publication of US20230103628A1 publication Critical patent/US20230103628A1/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/34—Belt retractors, e.g. reels
    • B60R22/36—Belt retractors, e.g. reels self-locking in an emergency
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/34—Belt retractors, e.g. reels
    • B60R22/343—Belt retractors, e.g. reels with electrically actuated locking means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/34—Belt retractors, e.g. reels
    • B60R22/3416—Unlocking devices for retractors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/34—Belt retractors, e.g. reels
    • B60R22/46—Reels with means to tension the belt in an emergency by forced winding up

Definitions

  • the present invention relates to a webbing winding device.
  • JP-A Japanese Patent Application Laid-Open (JP-A) No. 2002-2447 discloses a webbing winding device including a lock mechanism that restricts drawing-out from a spool of a webbing (belt) in emergency of a vehicle, such as at the time of rapid deceleration of a vehicle.
  • a locking pawl is engaged with a gear member provided integrally rotatably with the spool. Accordingly, rotation of the gear member is locked and drawing-out from the spool of the webbing is restricted.
  • the locking pawl is displaced toward the gear member by the solenoid being actuated.
  • an object of the present invention is to obtain a webbing winding device capable of preventing it from being difficult to displace the displacement member toward the original position.
  • a webbing winding device includes: a spool, a webbing to be attached to an occupant being wound around the spool, the spool being rotated in a drawing-out direction by the webbing being drawn out: a displacement member configured to be displaced between a first position and a second position, rotation in the drawing-out direction of the spool being enabled in a state in which the displacement member is disposed at the first position, and rotation in the drawing-out direction of the spool being locked in a state in which the displacement member is disposed at the second position; and an actuation portion, actuation of the actuation portion causing the displacement member to be displaced from the first position to the second position, wherein the displacement member is provided with a deformation allowing portion that is deformed in a case in which a part of the displacement member disposed at the second position is pressed toward the first position, and the deformation allowing portion is allowed to be displaced toward the first position of the part of the displacement member.
  • the displacement member in a webbing winding device according to a second aspect, includes an attracting portion that is attracted to the actuated actuation portion.
  • the displacement member when the actuation portion is actuated in an emergency of the vehicle, the displacement member is displaced from the first position to the second position, and the rotation in the drawing-out direction of the spool is locked. As a result, drawing-out from the spool of the webbing is restricted.
  • the webbing winding device when a part of the displacement member disposed at the second position is pressed toward the first position, the deformation allowing portion is deformed, and the displacement toward the first position of the part of the displacement member is allowed. As described above, in the webbing winding device according to the first aspect, it is possible to prevent the displacement member from being difficult to displace toward the original position.
  • the attracting portion of the displacement member is attracted to the actuation portion, and the displacement member is displaced from the first position to the second position. Accordingly, rotation in the drawing-out direction of the spool is locked and drawing-out from the spool of the webbing is restricted.
  • the webbing winding device when a part of the displacement member is pressed toward the first position in a state where the attracting portion is attracted to the actuation portion, the deformation allowing portion is deformed, and the displacement toward the first position of the part of the displacement member is allowed.
  • the webbing winding device it is possible to prevent the displacement member from being difficult to displace toward the original position.
  • FIG. 1 is an exploded perspective view showing a spool, a main lock, and the like constituting a part of a webbing winding device.
  • FIG. 2 is an exploded perspective view showing a solenoid, a sensor lever, a pawl, and the like constituting a part of a lock mechanism.
  • FIG. 3 is a side view showing a solenoid, a sensor lever, a pawl, and the like constituting a part of the lock mechanism, and shows a state in which the solenoid is stopped.
  • FIG. 4 is a side view showing a solenoid, a sensor lever, a pawl, and the like constituting a part of the lock mechanism, and shows a state in which the solenoid is actuated.
  • FIG. 5 is a side view showing a sensor lever and the like to which a configuration for preventing or suppressing a problem is applied.
  • FIG. 6 is a side view corresponding to FIG. 5 showing the sensor lever and the like to which the configuration for preventing or suppressing the problem is applied, and shows a state where the sensor lever disposed at the second position is pressed by the pawl.
  • FIG. 7 is a side view showing the sensor lever and the like to which the configuration for preventing or suppressing the problem is applied, and shows a state where the sensor lever disposed at the second position is pressed by the pawl.
  • a webbing winding device according to an embodiment of the present invention will be described with reference to FIGS. 1 to 4 .
  • the webbing winding device 10 of the present embodiment includes a spool 12 , a webbing 14 . and a lock mechanism 16 .
  • a spool 12 As shown in FIGS. 1 and 2 , the webbing winding device 10 of the present embodiment includes a spool 12 , a webbing 14 . and a lock mechanism 16 .
  • the axial direction, the radial direction, and the circumferential direction are simply indicated, the rotational axial direction, the rotational radial direction, and the rotational circumferential direction of the spool 12 are indicated.
  • the spool 12 is formed in a substantially cylindrical shape. Between a pair of leg pieces 18 A of a frame 18 (see FIG. 2 ), the spool 12 is rotatably supported by the frame 18 .
  • a known torsion shaft (not shown) constituting a force limiter mechanism is disposed inside the spool 12 .
  • a lock base 20 is provided on one side in the axial direction (arrow Z direction side) of the spool 12 .
  • the lock base 20 is coupled to the spool 12 through the torsion shaft.
  • the spool 12 is rotationally urged in the winding direction by a winding urging mechanism (not shown).
  • the webbing 14 is attached to the body of an occupant seated on a vehicle seat, and has a base end portion, which is one end portion in the longitudinal direction, locked to the spool 12 .
  • the spool 12 is rotationally urged in a winding direction (direction of an arrow C in FIG. 1 and the like) being one rotation direction by an urging force of a spiral spring constituting a part of a winding urging mechanism. Then, the spool 12 is rotated in the winding direction, whereby the webbing 14 is wound around the spool 12 from the base end side.
  • the webbing 14 is drawn out from the spool 12 , whereby the spool 12 is rotated in a drawing-out direction (direction opposite to the arrow C in FIG. 1 and the like) being the other rotation direction.
  • a winding mechanism such as a pretensioner mechanism that rotates the spool 12 in the winding direction in an emergency or the like of the vehicle described below may be provided.
  • the lock mechanism 16 includes a main lock 22 supported by the lock base 20 and a main lock engagement portion 24 with which the main lock 22 is engaged.
  • the lock mechanism 16 includes a pawl engagement member 26 as an engagement member provided to be integrally rotatable with the spool 12 .
  • the lock mechanism 16 includes a pawl 28 and a sensor lever 30 disposed radially outside the pawl engagement member 26 , and a solenoid 32 disposed to face the sensor lever 30 .
  • the main lock 22 is formed in a substantially rectangular block shape.
  • the base end side of the main lock 22 is supported in a tiltable manner by a main lock support portion provided on the lock base 20 .
  • a main lock engaging tooth 22 A to be engaged with a main lock tooth to be engaged 24 A of the main lock engagement portion 24 described below is formed.
  • the main lock 22 is tilted (displaced) radially outward with the main lock support portion as a supporting shaft portion, whereby the main lock engaging tooth 22 A is engaged with the main lock tooth to be engaged 24 A of the main lock engagement portion 24 .
  • the main lock 22 is provided with a cylindrical protrusion 22 B protruding toward one side in the axial direction.
  • the main lock engagement portion 24 is formed in an annular shape as an example, and a plurality of main lock tooth to be engaged 24 A (ratchet teeth) are formed along the circumferential direction in the inner circumferential portion of the main lock engagement portion 24 .
  • the main lock engagement portion 24 may be formed integrally with the frame 18 (see FIG. 2 ) that supports the spool 12 , or may be provided separately from the frame 18 .
  • the pawl engagement member 26 is formed in a disc shape. A radially central portion of the pawl engagement member 26 is rotatably supported by a torsion shaft (not shown) or a lock base 20 . On the radially outer side of the portion supported by the torsion shaft (not shown) or the lock base 20 in the pawl engagement member 26 , a long hole-shaped actuation groove 26 A in which the protrusion 22 B of the main lock 22 is disposed inside is formed. A plurality of pawl tooth to be engaged 26 B (ratchet teeth) with which a pawl engaging tooth 28 D of the pawl 28 described below is engaged are formed along the circumferential direction in the outer circumferential portion of the pawl engagement member 26 .
  • the above-described pawl engagement member 26 is rotationally urged in the drawing-out direction with respect to the lock base 20 by a coil spring (not shown) provided between the pawl engagement member 26 and the lock base 20 , and has the rotation by the coil spring in the drawing-out direction with respect to the lock base 20 locked.
  • the pawl 28 is supported in a tiltable (rotationally displaceable) manner by the housing 34 .
  • the housing 34 is attached to the frame 18 .
  • a main lock engagement portion 24 , a main lock 22 , and the like are disposed inside the housing 34 .
  • the pawl 28 includes a tubular portion 28 A that is rotatable around a cylindrical first supporting shaft portion 34 A that is provided in the housing 34 . by inserting the first supporting shaft portion 34 A.
  • the pawl 28 includes a first arm portion 28 B that protrudes from the other side in the axial direction (side opposite to the direction of arrow Z) of the tubular portion 28 A toward the outer side in the radial direction of the tubular portion 28 A.
  • a pawl first abutting portion 28 C on which a part of the first arm portion 30 B abuts is formed on the first arm portion 30 B side of the sensor lever 30 described below in the tip portion of the first arm portion 28 B.
  • the pawl 28 further includes a second arm portion 28 E that protrudes from one axial side (arrow Z direction side) of the tubular portion 28 A toward the radially outer side of the tubular portion 28 A and the side opposite to the direction in which the first arm portion 28 B protrudes.
  • a pawl second abutting portion 28 F which abuts on the housing first abutting portion 34 B (see FIG. 3 ) of the housing 34 is formed in a tip portion of the second arm portion 28 E.
  • the sensor lever 30 as a displacement member, includes a tubular portion 30 A that is rotatable around a cylindrical second support shaft portion 34 C that is provided in the housing 34 , by inserting the second support shaft portion 34 C.
  • the sensor lever 30 includes a first arm portion 30 B that protrudes from one side in the axial direction (arrow Z direction side) of the tubular portion 30 A toward the outer side in the radial direction of the tubular portion 30 A.
  • a sensor lever first abutting portion 30 C as an engagement portion abutting on the pawl first abutting portion 28 C is formed. As shown in FIG.
  • a sensor lever-side spring locking portion 30 D to which an end portion on one side of the return spring 36 is locked is formed on the side opposite to the sensor lever first abutting portion 30 C in the tip portion of the first arm portion 30 B.
  • An end portion on the other side of the return spring 36 is locked to a housing-side spring locking portion 34 D provided in the housing 34 . Then, the return spring 36 is deformed along with the tilt of the sensor lever 30 (tilt toward a second position P 2 described below), whereby the sensor lever 30 is urged toward a first position P 1 described below.
  • the sensor lever 30 includes a second arm portion 30 E as an attracting portion that protrudes from the tubular portion 30 A toward the radially outer side of the tubular portion 30 A and the side opposite to the direction in which the first arm portion 30 B protrudes.
  • a plate 30 F as an attracting portion is fixed to the solenoid 32 side described below in the second arm portion 30 E.
  • the plate 30 F is formed in a rectangular plate shape using iron or steel metal as an example, and constitutes a part of the sensor lever 30
  • the plate 30 F may be embedded inside the second arm portion 30 E.
  • a sensor lever second abutting portion 30 G abutting on the housing second abutting portion 34 E of the housing 34 is formed in the tip portion of the second arm portion 30 E and on one side in the axial direction (arrow Z direction side).
  • the solenoid 32 as an actuation portion generates a magnetic field when applied with a predetermined voltage and energized (actuated).
  • the solenoid 32 is configured by winding a conducting wire around an iron core (a coil is formed around the iron core).
  • the sensor lever 30 takes a predetermined attitude with respect to the housing 34 .
  • the position of the sensor lever 30 in this state is referred to as a first position P 1 .
  • the pawl 28 is tilted from the engagement-release position P 3 toward one side (arrow C 2 direction side) around the first supporting shaft portion 34 A, and the pawl engaging tooth 28 D of the pawl 28 is engaged with the pawl tooth to be engaged 26 B of the pawl engagement member 26 .
  • the rotation in the drawing-out direction (the drawing-out direction of the spool 12 ) of the pawl engagement member 26 is restricted (regulated).
  • the position of the pawl 28 in a state where the pawl engaging tooth 28 D of the pawl 28 can engage with the pawl tooth to be engaged 26 B of the pawl engagement member 26 is referred to as an engaging position P 4 .
  • the position of the sensor lever 30 in the state where the pawl 28 is positioned at the engaging position P 4 is referred to as a second position P 2 .
  • the direction and magnitude of the attracting force by which the solenoid 32 attracts the second arm portion 30 E (plate 30 F) of the sensor lever 30 are indicated by an arrow F.
  • the attracting force F is assumed to coincide with the direction from the N pole to the S pole or the direction from the S pole to the N pole which are the directions of the magnetic field generated by the solenoid 32 .
  • the webbing 14 is drawn out from the spool 12 , whereby the webbing 14 is attached to the occupant seated on the vehicle seat.
  • the solenoid 32 is actuated as shown in FIG. 4 .
  • the second arm portion 30 E (plate 30 F) of the sensor lever 30 is attracted to the solenoid 32 , and the sensor lever 30 is tilted from the first position P 1 to the second position P 2 .
  • the sensor lever 30 When the sensor lever 30 is tilted from the first position P 1 to the second position P 2 , the sensor lever first abutting portion 30 C of the first arm portion 30 B of the sensor lever 30 presses the pawl first abutting portion 28 C of the pawl 28 . Accordingly, the pawl 28 is tilted from the engagement-release position P 3 toward the engaging position P 4 , and the pawl engaging tooth 28 D of the pawl 28 is engaged with the pawl tooth to be engaged 26 B of the pawl engagement member 26 . As a result, the rotation in the drawing-out direction (the drawing-out direction of the spool 12 ) of the pawl engagement member 26 is restricted.
  • FIG. 5 shows a sensor lever 30 , a pawl 28 , and a pawl engagement member 26 to which a configuration for preventing or suppressing the above-described problem is applied.
  • illustration of the sensor lever-side spring locking portion 30 D, the sensor lever second abutting portion 30 G. and the like of the sensor lever 30 is omitted.
  • the illustration on the second arm portion 28 E side in the pawl 28 is omitted.
  • a thinned groove 30 H as a deformation allowing portion formed in an L shape when viewed from the axial direction is formed in the first arm portion 30 B of the sensor lever 30 to which the present configuration is applied.
  • the thinned groove 30 H includes a first groove portion 30 H 1 in which a part of the first arm portion 30 B is cut out so that the side opposite to the pawl 28 is opened and the pawl 28 side is closed.
  • the thinned groove 30 H includes a second groove portion 30 H 2 in which a portion from an end portion on the pawl 28 side of the first groove portion 30 H 1 in the first arm portion 30 B to the tubular portion 30 A is cut out.
  • the first arm portion 30 B of the sensor lever 30 is deformed from the state indicated by the two-dot chain line to the state indicated by the solid line with the edge portion of the thinned groove 30 H as the deformation starting point. That is, deformation is made so that the groove interval of the thinned groove 30 H is narrowed.
  • the sensor lever first abutting portion 30 C side with respect to the portion where the thinned groove 30 H is formed in the first arm portion 30 B is displaced to the side opposite to the pawl 28 (the first position P 1 side). Accordingly, displacement toward the engagement-release position P 3 of the pawl 28 is allowed.
  • the case where an excessive force such that the pawl 28 attempts to return from the engaging position P 4 toward the engagement-release position P 3 is input to the pawl 28 is assumed to be a case where an excessive pressing force B 2 is generated at the contact point between the sensor lever 30 and the pawl 28 along with the fact that the spool 12 is rotationally urged in the winding direction by the urging force of the spiral spring or the like described above.
  • the pawl 28 is configured to be engaged with the pawl engagement member 26 along with the displacement of the sensor lever 30 , that is, an example in which the sensor lever 30 is configured to be indirectly engaged with the pawl engagement member 26 through the pawl 28 has been described, but the present invention is not limited thereto.
  • the sensor lever 30 may be configured to be directly engaged with the pawl engagement member 26 .
  • a portion corresponding to the above-described pawl 28 is denoted by the same reference numeral as the portion corresponding to the above-described pawl 28 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automotive Seat Belt Assembly (AREA)
US17/909,955 2020-03-26 2021-01-12 Webbing winding device Pending US20230103628A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2020-056845 2020-03-26
JP2020056845A JP2021154862A (ja) 2020-03-26 2020-03-26 ウェビング巻取装置
PCT/JP2021/000717 WO2021192494A1 (ja) 2020-03-26 2021-01-12 ウェビング巻取装置

Publications (1)

Publication Number Publication Date
US20230103628A1 true US20230103628A1 (en) 2023-04-06

Family

ID=77890319

Family Applications (1)

Application Number Title Priority Date Filing Date
US17/909,955 Pending US20230103628A1 (en) 2020-03-26 2021-01-12 Webbing winding device

Country Status (4)

Country Link
US (1) US20230103628A1 (zh)
JP (1) JP2021154862A (zh)
CN (1) CN115243941A (zh)
WO (1) WO2021192494A1 (zh)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002234417A (ja) * 2000-12-04 2002-08-20 Takata Corp シートベルト巻き取り装置
DE102010063903A1 (de) * 2010-12-22 2012-06-28 Takata-Petri Ag Sensor
JP5924987B2 (ja) * 2012-03-07 2016-05-25 芦森工業株式会社 シートベルト用リトラクタ
JP6555951B2 (ja) * 2015-07-07 2019-08-07 株式会社東海理化電機製作所 ウェビング巻取装置
JP2018197009A (ja) * 2017-05-23 2018-12-13 芦森工業株式会社 シートベルトリトラクタ
JP6792591B2 (ja) * 2018-05-09 2020-11-25 オートリブ ディベロップメント エービー シートベルト用リトラクタ

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Publication number Publication date
CN115243941A (zh) 2022-10-25
JP2021154862A (ja) 2021-10-07
WO2021192494A1 (ja) 2021-09-30

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